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Headlight Switch (Headlamp)

This category on the website [ Switches and Wiring ] we are giving you all of the information related to the individual switches in the Buick Turbo Regal, along with the associated wiring, connector plugs, etc.

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VEHICLE APPLICATION:

Buick Regal, T-Type, Turbo T, Limited, Grand National, GNX

SWITCH NAME:

Head Light switch

PURPOSE OF SWITCH:

turns the parking lights and head lights on
powers up twilight sentinel system
powers up other things

TURNS ON-OFF / FUNCTIONS / USED WHEN:

when you push the switch(es) in, the lights come on

LOCATION IN VEHICLE:

lower dashboard, left of steering wheel

ORIGINAL GM PART NUMBER:

1987380

SWITCH / BASE COLOR:

black with brass tabs

CONNECTOR PLUG COLOR (SWITCH SIDE):

black

WIRES ATTACHED (SWITCH SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

white

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

8 (on 6 terminals)

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

brown “A” (park lamps), goes to (junction) to IP cluster dimmer switch (“A”)
(connects with sentinel amplifier “H”)
(connects with turn-hazard switch assembly [in steering column] for front cornering lights on a Regal Limited)
(connects with fuse box, radio, front marker lights, front bumper lights, all tail lights, license light, under hood light, coach lights, and audio alarm module [“chime alarm” in convenience center])

[2 wires on 1 terminal:]
yellow “D” (1 of 2 wires), goes to headlight dimmer switch (the rotary dial) “C”
yellow “D” (1 of 2 wires), goes to twilight sentinel amplifier “F”

red “C”, goes to (junction) to fusible link “B”
(connects with other fusible links)

orange “E” (2 wires), goes to tail lamp fuse
(connects with twilight sentinel [“K”] )

[2 wires on 1 terminal:]
black “B” (1 of 2 wires), goes to (junction) to twilight sentinel photocell
red-white “B” (1 of 2 wires), goes to twilight sentinel amplifier “M”

orange “F”, goes to twilight sentinel amplifier “M”

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PHOTOS OF SWITCH AND CONNECTED WIRES:
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OTHER NOTES:

called “light switch” on diagrams.

Small switch on right side, labelled “P” turns on just the running (“Park”) lights.
Big switch on left side turns on head lamps as well as the parking lamps (the small switch is automatically pressed in too, when the main switch is depressed).

The big switch on the bottom shuts off one or both of the above switches.

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Here’s all of the Switches in the Buick Turbo Regals:
(you can click these links to go direct to these posts)

* A/C High Pressure Cut-out Switch (Back of Compressor)
* A/C Pressure Cycling Switch (on Accumulator)
* A/C Pressure Line (Under Alternator)
* Blower and A/C Clutch Control Module Switch (HVAC Fan Speed Control)
* Brake Pressure Switch (in Prop Valve)
* Brake Switch (Above Brake Pedal)
* Coolant Fan Temperature Switch (Under Throttle Linkage)
* Cooling High Temperature Switch (Manifold Front Passenger Side; Idiot Light)
* Cornering Light Switch (Regal Limited Models)
* Cruise Control Switch (Lever)
* Cruise Control Brake Switch
* Defogger Control Switch (Rear Defogger Button)
* Dome Reading Lights Switch
* Door Jamb Switch (Both Sides)
* Electronic Air Conditioning Touch Climate Control (Electric Touch A/C)
* Gear Selector Switch
* Glove Box Switch (for Light)
* Hazard Switch (Emergency Flashers)
* Headlight Switch
* Headlight Dimmer Switch (High Beam)
* Hobbs Switch (Digital Dash Cars)
* Horn Button Switch
* HVAC Fan Speed Control Switch (Heater A/C Control Head Blower Switch)
* HVAC Mode Control (Heater A/C Control Head Mode Switch)
* Ignition Switch
* Ignition Key Warning Switch
* Instrument Cluster Dimmer Switch (Dash Lights Brightness)
* Neutral Safety and Backup Light Switch
* Oil Pressure Switch
* Overtemp Hot Switch
* Park Brake Switch (Emergency Brake)
* PowerMaster Brake Switch
* Power Door Lock Switch (Both Sides)
* Power Seat Switch
* Power Window Switch (Both Sides)
* Radio Button (on/off Switch)
* Rear View Mirror Map Light Switch
* Seat Belt Switch
* Sunroof Switch (Astroroof Moonroof)
* Theft Deterrent Warning System Tamper Switches
* Trunk Light Switch
* Trunk Release Button
* Turbo Power Light Switch (Digital Dash Cars)
* Turn Signal Switch (Lever)
* Twilight Sentinel Switch (Rotary Dial)
* Under Hood Light Switch (engine bay compartment)
* Vanity Mirror Light Switch (Passenger Side Visor)
* Wiper and Washer Switch

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